saluti a tutti.......una domanda per una delucidazione: ho sottoposto a validazione se così si dice, le pagine del mio sito http://smsaurora.it tutte tranne una sono risultate validate e cioè la pagina

http://smsaurora.it/il-meteo.html mi viene fuori la seguente dicitura:

Validation Output:                        6 Errors        

1.          Line 144,        Column 331:     & did not start a character reference. (& probably should have been escaped as &amp;.)     …ts/newsshow/iframe.html?format=300x250&topic=h&hl=_auto_"></iframe></div></div…

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2.          Line 144,        Column 339:     & did not start a character reference. (& probably should have been escaped as &amp;.)     …sshow/iframe.html?format=300x250&topic=h&hl=_auto_"></iframe></div></div></div>

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3.          Line 144,        Column 350:     Attribute border not allowed on element iframe at this point.     …sshow/iframe.html?format=300x250&topic=h&hl=_auto_"></iframe></div></div></div>Attributes for element iframe:Global attributessrcsrcdocnamesandboxseamlessallowfullscreenwidthheight
4.          Line 144,        Column 350:     The frameborder attribute on the iframe element is obsolete. Use CSS instead.     …sshow/iframe.html?format=300x250&topic=h&hl=_auto_"></iframe></div></div></div>

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5.          Line 144,        Column 350:     The marginwidth attribute on the iframe element is obsolete. Use CSS instead.     …sshow/iframe.html?format=300x250&topic=h&hl=_auto_"></iframe></div></div></div>

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6.          Line 144,        Column 350:     The marginheight attribute on the iframe element is obsolete. Use CSS instead.     …sshow/iframe.html?format=300x250&topic=h&hl=_auto_"></iframe></div></div></div>

una pura curiosità......da profano......qualche dritta???